README.md

In floswald/mnlogit: Multinomial Logit Model

mnlogit

• I recovered this code from the CRAN archives.
• I am not the author of the package.
• I am not the maintainer of it either.

installation

• you need a c compiler that can handle the -fopenmp flag for openMP support.
• to test for that, you should copy this into a text file: c #include <omp.h> #include <stdio.h> int main() { #pragma omp parallel printf("Hello from thread %d, nthreads %d\n", omp_get_thread_num(), omp_get_num_threads()); }
• and compile it with a command like gcc -fopenmp test.c -o test.x
• If that worked you should see this upon execution of that program: ➜ ~ ./test.x Hello from thread 3, nthreads 8 Hello from thread 1, nthreads 8 Hello from thread 2, nthreads 8 Hello from thread 4, nthreads 8 Hello from thread 5, nthreads 8 Hello from thread 6, nthreads 8 Hello from thread 0, nthreads 8 Hello from thread 7, nthreads 8
• If not, you need to get a modern c-compiler. a good option for mac users is to via homebrew. just type brew install gcc.
• Depending on the version you get (most recent), you will have something like gcc-x.y available on your command line. I have gcc-9.2 for example. We need to tell R to use that particular compiler when we build mnlogit (or any other package).
• You achieve that by editing the file ~/.R/Makevars. You probably have to create ~/.R.

• You could just copy my version. there is a bunch of comments to build different packages. you could just comment out different things for different builds. ``` # floswald 2019 # based on http://lists.r-forge.r-project.org/pipermail/rcpp-devel/2012-May/003845.html

  for C code

  CFLAGS=-g -O3 -Wall -pipe -pedantic -std=gnu99 -march=native

  CFLAGS=-O3 -g0 -Wall -pipe -pedantic -std=gnu99 -I/usr/local/cuda/include

  CFLAGS=-ggdb

  CFLAGS=-g -O3 -w -fopenmp -mtune=native

  for C++ code

  CXXFLAGS=-g -Wall -O0 -gmodules

  CXXFLAGS=-g0 -O3 -Wall -pipe -pedantic -Wno-variadic-macros

  CXXFLAGS=-std=c++0x -g -O3 -Wall -pipe -pedantic -Wno-variadic-macros

  CXXFLAGS=-ggdb -w -DBZ_DEBUG

  CXXFLAGS=-O3 -w -DN_DEBUG -UNDEBUG -DARMA_NO_DEBUG

  CXXFLAGS= -O3 -Wall -pedantic -mtune=native -pipe -fopenmp

  just a test before RcppArmadillo undef'ed thispp

  PKG_CPPFLAGS= -UNDEBUG

  for Fortran code

  FFLAGS=-g -O3 -Wall -pipe

  FFLAGS=-O3 -g0 -Wall -pipe

  for Fortran 95 code

  FCFLAGS=-g -O3 -Wall -pipe

  FCFLAGS=-O3 -g0 -Wall -pipe FLIBS=-L/usr/local/lib/gcc/9 -lgfortran -lquadmath -lm

  Choose C and C++ compiler versions

  gcc 9.2

  VER=9 CC=gcc-$(VER) CXX=g++-$(VER)

  CXX=clang

  FC=gfortran F77=gfortran ```

floswald/mnlogit documentation built on Dec. 24, 2019, 7:04 p.m.